{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-71971","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","state":"PUBLISHED","assignerShortName":"VulnCheck","dateReserved":"2026-08-08T16:43:04.178Z","datePublished":"2026-09-29T21:29:20.055Z","dateUpdated":"2026-09-30T14:03:55.512Z"},"containers":{"cna":{"providerMetadata":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-09-29T21:29:20.055Z"},"datePublic":"2026-07-28T00:00:00.000Z","title":"U-Boot before 2026.10-rc3 Out-of-Bounds Write in IP Fragment Reassembly","descriptions":[{"lang":"en","value":"U-Boot before 2026.10-rc3 with CONFIG_IP_DEFRAG enabled contains an out-of-bounds write vulnerability in the __net_defragment() function in net/net.c. Remote attackers can send a crafted IP fragment with non-zero offset and More-Fragments flag set during netboot to corrupt adjacent memory and crash the bootloader."}],"problemTypes":[{"descriptions":[{"lang":"en","description":"Out-of-bounds Write","cweId":"CWE-787","type":"CWE"}]}],"affected":[{"vendor":"u-boot","product":"u-boot","repo":"https://github.com/u-boot/u-boot","packageURL":"pkg:github/u-boot/u-boot","defaultStatus":"unaffected","versions":[{"version":"0","lessThan":"2026.10-rc3","status":"affected","versionType":"custom"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:denx:u-boot:*:*:*:*:*:*:*:*","versionEndExcluding":"2026.10-rc3"}]}]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":8.8,"baseSeverity":"HIGH"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"HIGH","baseScore":8.2,"baseSeverity":"HIGH"}}],"references":[{"url":"https://github.com/u-boot/u-boot/commit/04ca915d5bf39dda5d1bce62d04d2b59d293c5b9","tags":["patch"]},{"url":"https://github.com/u-boot/u-boot/blob/v2026.07/net/net.c#L975","tags":["technical-description"]},{"url":"https://github.com/u-boot/u-boot","tags":["product"]},{"name":"VulnCheck Advisory: U-Boot before 2026.10-rc3 Out-of-Bounds Write in IP Fragment Reassembly","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/u-boot-before-2026.10-rc3-out-of-bounds-write-in-ip-fragment-reassembly"}],"credits":[{"lang":"en","value":"Shahriyar Jalayeri (ByteRay Ltd.)","type":"finder"},{"lang":"en","value":"Mehrun P. Hunter (ByteRay Ltd.)","type":"finder"}],"x_generator":{"engine":"vulncheck-endgame"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-30T14:03:42.839708Z","id":"CVE-2026-71971","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-09-30T14:03:55.512Z"}}]}}